My game previews have really slowed down or show a black screen.

HI. I'm running a file that I saved yesterday that was running just fine at 60 fps. Today when I opened it up and try to preview it I get a black screen or a framerate of 2 per second. I tried opening old files I have and its the same thing, black screen or really slowed down frame rate.

Did something happen, was there and update recently that may have caused this?

Also, I tried opening one of my older files on an older version of Construct and im having the same issues. Really confused on what can be causing this as I have not changed anything since yesterday when it was all working fine.

I usually use chrome to run my game. I just tried running it on Microsoft Edge and it works just fine now. What about Chrome could cause this to happen?

Try pressing F12 in preview and see if there are any error messages in the console log.

runtime.js:23 [C3 runtime] The renderer indicates a major performance caveat. Software rendering may be in use. This can result in significantly degraded performance.

This is what comes up. Have you seen this before?

Nope. Can you test if this happens with previous versions of C3? If the same project works fine in r327, I suggest you log a bug report:

github.com/Scirra/Construct-bugs/issues

The renderer indicates a major performance caveat. Software rendering may be in use. This can result in significantly degraded performance.

This generally means your graphics drivers are either broken or out of date and so now you're getting software rendering instead of hardware acceleration. Try installing any available system software updates, or updating the graphics driver. You can check the status of the GPU in Chrome by visiting chrome://gpu.